High aphid numbers are being found in fields in counties bordering Lake Simcoe (Simcoe, Durham and Victoria). Spraying has been necessary in many of the fields that have been scouted. Scouting is advised in all fields in that region, starting first with the fields that were not treated with Cruiser. Cruiser treated fields should not be reaching threshold yet but could be starting to have aphids colonize in them. Past 35-40 days after planting the insecticide is no longer toxic to the aphid, but these fields have most likely not had enough time to build up to threshold levels yet. So if time is limited, scout non-Cruiser fields first, then return to the Cruiser fields to scout on a weekly basis to stay ahead of any situations.
Written by Tracey Baute
Areas of Focus • Collaborate on applied research and demonstration projects to validate/determine practical integrated insect management solutions • Monitor for and implement strategies for new invasive species • Co-developer of the Aphid Advisor App • Co-author of Publication 812, Field Crop Protection Guide
September 20, 2019
September 5, 2019
August 15, 2019